安装依赖
如果你刚刚从 版本控制 签出软件包，则需要安装这些依赖。
¥If you have just checked out a package from version control, you will need to install those dependencies.
如果你的项目是 添加依赖，那么这些依赖会在此过程中自动安装。
¥If you are adding dependencies for your project, then those dependencies are automatically installed during that process.
安装依赖
yarn install 用于安装项目的所有依赖。从项目的 package.json 文件中检索依赖，并将其存储在 yarn.lock 文件中。
¥yarn install is used to install all dependencies for a project. The dependencies are retrieved from your project’s package.json file, and stored in the yarn.lock file.
开发包时，安装依赖通常是在以下之后完成：
¥When developing a package, installing dependencies is most commonly done after:
-
你刚刚签出了需要这些依赖才能运行的项目的代码。
¥You have just checked out code for a project that needs these dependencies to function.
-
该项目的另一位开发者添加了一个新的依赖，你需要选择该依赖。
¥Another developer on the project has added a new dependency that you need to pick up.
安装选件
安装依赖有很多选项，包括：
¥There are many options for installing dependencies, including:
-
安装所有依赖：
yarn或yarn install¥Installing all dependencies:
yarnoryarn install -
安装一个且仅一个版本的软件包：
yarn install --flat¥Installing one and only one version of a package:
yarn install --flat -
强制重新下载所有包：
yarn install --force¥Forcing a re-download of all packages:
yarn install --force -
仅安装生产依赖：
yarn install --production¥Installing only production dependencies:
yarn install --production
请参阅 完整列表 个可传递给 yarn install 的标志。
¥See the full list of flags you can pass to yarn install.